| Olney to Orbetello | 4,400.89 mi (7,082.56 km) |
| Olney to Oria | 4,753.60 mi (7,650.17 km) |
| Olney to Oristano | 4,370.64 mi (7,033.87 km) |
| Olney to Orta Nova | 4,638.23 mi (7,464.50 km) |
| Olney to Orte | 4,451.75 mi (7,164.40 km) |
| Olney to Ortona | 4,543.55 mi (7,312.14 km) |
| Olney to Orvieto | 4,430.60 mi (7,130.37 km) |
| Olney to Orzinuovi | 4,245.63 mi (6,832.68 km) |
| Olney to Osimo | 4,463.23 mi (7,182.88 km) |
| Olney to Ospitaletto | 4,246.55 mi (6,834.16 km) |
| Olney to Ostuni | 4,742.42 mi (7,632.19 km) |
| Olney to Ottaviano | 4,601.96 mi (7,406.14 km) |
| Olney to Ovada | 4,214.81 mi (6,783.08 km) |
| Olney to Ozieri | 4,366.03 mi (7,026.44 km) |
| Olney to Paceco | 4,621.37 mi (7,437.37 km) |
